Hollywood's expecting mama's are ready to pop and "omg! Insider" sat down with OBGYN Dr. Gail N. Jackson to get her expert opinion about who will welcome their bundle of joy first. So who will it be? Check out the vid to hear which mama-to-be -Kate Middleton, Jessica Simpson, or Kim Kardashian - could be getting a visit from the stork any day. For the latest entertainment news, check out omg! Insider on TV.